I'm new to the automatic ballast. Got an 04 Moomba Mobius with the center sac. fill switch works and pump turns on, but no water is going in the bag. I found the incoming water valve to the pump and that is open as well. any suggestions?

Like Bill said it is time to start following the flow. Start at the pump and make your way down the line. Usually it is either the Rule pump or some sort of blockage in the line. The process shouldn't take too long. Good luck.